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Ok, start with the flugzeug photos. The fw-190 looks like the Dora reproduction. Is that the one with the Allison V-12? The other of course is the ubiquitous ME-109. Ugly buggers, but certainly performed quite well. With your prompting the other day Randy, I went crawling around on the web looking up information on these buggers. Got totally lost in photos, videos, and information. Then I went to bed, laid on my side, and it mostly drained out. I never did find the photo of that particular ME-109.

Thermals---I need thermals!

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Well, yes, both the FW-190D-9 and the Bf-109G-10 are both powered by Allison V-1710, V-12 engines. In case you're wondering, depending on the model of engine, they put out between 1200 to 1400 horsepower. The reason for the engine changes are because of availability, reliability and ease of maintenance. They are also lighter and smaller so they could fit in the cowlings upright instead of inverted, like the original German engines. Quite a neat installation as they look completely stock.
The "B" model P-51 Mustang had a thinner wing airfoil, only 4, .50 caliber machine guns, tilted at a 45 degree angle to fit into the thinner wings and the "razorback" fuselage, aft of the cockpit reduced drag for higher speed at the expense of overall visibility.
Thanks for asking, Jim.

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I had figured that the fewer machine guns played a role in the speed difference. Figured the razorback did too. I am surprised to learn about the different airfoils. Never knew it had been changed like that during the production of the Mustang.